SHAREHOLDERS' DEFICIT (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 27, 2019	Jun. 30, 2021	Jun. 24, 2020	Jun. 26, 2019	Jun. 27, 2018
Schedule of Capitalization, Equity [Line Items]
Common stock issuance, shares			8.1
Common stock issued average price per share			$ 18.25
Proceeds from common stock issuance			$ 139.1
Proceeds from issuance of treasury stock		$ 30.7	$ 1.6	$ 3.0
Purchases of treasury stock, shares		0.1	0.8
Payments for repurchase of common stock		$ 4.2	$ 32.4	167.7
Increase In Share Repurchase Program				$ 300.0
Stock repurchase program, total authorizations		4,900.0
Stock repurchase program, remaining authorized amount available		166.8
Common stock dividends per share declared	$ 0.38		$ 1.14	$ 1.52
Payments of dividends		$ 1.5	$ 57.4	$ 60.3
Retirement of treasury stock, shares			114.0
Retirement of treasury stock, price per share			$ 29.45
Treasury stock, shares		24.4	25.3
Total shareholders' deficit		$ (303.3)	$ (479.1)	$ (778.2)	$ (718.3)
Common Stock
Schedule of Capitalization, Equity [Line Items]
Issuances of common stock, shares		1.0	8.3	0.3
Purchases of treasury stock, shares		0.1	0.8	3.6
Retirement of treasury stock, shares			0.0
Total shareholders' deficit		$ 7.0	$ 7.0	$ 17.6	17.6
Retained Earnings (Accumulated Deficit)
Schedule of Capitalization, Equity [Line Items]
Total shareholders' deficit		$ (266.1)	$ (397.5)	2,771.2	2,683.0
Accounting Standards Update 2014-09 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Schedule of Capitalization, Equity [Line Items]
Total shareholders' deficit					(7.4)
Accounting Standards Update 2014-09 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings (Accumulated Deficit)
Schedule of Capitalization, Equity [Line Items]
Total shareholders' deficit					$ (7.4)
Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Schedule of Capitalization, Equity [Line Items]
Total shareholders' deficit				195.9
Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings (Accumulated Deficit)
Schedule of Capitalization, Equity [Line Items]
Total shareholders' deficit				$ 195.9